Swelling and shrinking behavior of Slide-Ring gel

Rumiko Kasahara, Kentaro Kayashima, Yoshiyuki Amemiya, Yasushi Okumura, Kohzo Ito

Research output: Contribution to conferencePaperpeer-review


The slide-ring gel is synthesized from the polyrotaxane in which a poly(ethylene glycol) chain with large molecular weight is sparsely included by α-cyclodextrins. By chemically cross-linking α-cyclodextrins contained in the polyrotaxanes in solutions, the polymer chains with bulky end groups are topologically interlocked by figure-of-eight cross-links. Therefore, the polymer chains freely pass through the cross-links acting like pulleys, which is supposed to automatically equalize the nanoscopic heterogeneity in structure and stress. In this study, we immersed a slide-ring gel in water 2 hours after the initiation of the reaction, and observed that the gel swelled to ca. 8,000 times the dry weight. These volume changes by a change of the solvent composition (acetone/water mixture) were reversible without first order volume transition unlike conventional electrolyte chemical gels.

Original languageEnglish
Number of pages1
Publication statusPublished - 2005
Externally publishedYes
Event54th SPSJ Annual Meeting 2005 - Yokohama, Japan
Duration: May 25 2005May 27 2005


Other54th SPSJ Annual Meeting 2005

All Science Journal Classification (ASJC) codes

  • General Engineering


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